Endoscopic treatment instrument

Abstract

A treatment device for an endoscope has a tubular sheath portion having an inlet opening at the proximal end thereof and a long treatment device body provided with a basket at the distal end thereof, wherein the treatment device body is advanceably/retreatably inserted into the sheath portion through the inlet opening, and the basket is projected from and retreated into the distal end of the sheath portion by advancing and retreating the treatment device body relative to the sheath portion. The treatment device for an endoscope has an installation portion that is placed between an endoscope, at which forceps plug opening is provided, and the sheath portion and installs the sheath portion to the endoscope such that the inlet opening and the forceps plug opening are arranged opposite to each other on substantially the same line.

1 . An endoscopic treatment instrument comprising:
 a cannular sheath having an entrance-opening section at a base end section; and   an elongated treatment instrument main body having a treatment section at a tip section, wherein   the treatment instrument main body inserted in the sheath via the entrance-opening section is capable of advancing and retracting,   the treatment section can be advanced and retracted from the tip of the sheath by advancing and retracting the treatment instrument main body with respect to the sheath, and   the endoscopic treatment instrument further comprises an attachment section, disposed between the sheath and an endoscope having a forceps port, for attaching the sheath to the endoscope so that the entrance-opening section and the forceps port are disposed on a line so as to substantially face each other.   
     
     
         2 . The endoscopic treatment instrument according to  claim 1 , wherein
 the attachment section is provided with an attachment adapter detachably attached to the endoscope; and an attachment member provided to the sheath to detachably attach the sheath to the attachment adapter.